US1846636A - Telephone cable - Google Patents

Telephone cable Download PDF

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Publication number
US1846636A
US1846636A US397224A US39722429A US1846636A US 1846636 A US1846636 A US 1846636A US 397224 A US397224 A US 397224A US 39722429 A US39722429 A US 39722429A US 1846636 A US1846636 A US 1846636A
Authority
US
United States
Prior art keywords
conductor
wrapping
ribbon
cable
magnetic
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
US397224A
Other languages
English (en)
Inventor
Fischer Ernst
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Siemens Schuckertwerke AG
Original Assignee
Siemens Schuckertwerke AG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Siemens Schuckertwerke AG filed Critical Siemens Schuckertwerke AG
Application granted granted Critical
Publication of US1846636A publication Critical patent/US1846636A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
    • H01B11/00—Communication cables or conductors
    • H01B11/02—Cables with twisted pairs or quads
    • H01B11/12—Arrangements for exhibiting specific transmission characteristics
    • H01B11/14—Continuously inductively loaded cables, e.g. Krarup cables
    • H01B11/143—Continuously inductively loaded cables, e.g. Krarup cables using helically wound magnetic tape

Definitions

  • My invention relates to improvements in telephone cables, and more particularly to continuously loaded cables ⁇ lirarup cables).
  • a holding member in the form of a ribbon, wire or the like may be placed over the magnetic layer, and may consist of a single ribbon or a plurality of ribbons.
  • This holding member which forces the overlapping portions tightly together in order to keep the air gap or the leakage constant may either consist of an insulating material, or a conducting or a magnetic material.
  • the annealing after the wrapping process may be omitted because the material is not stretched or extended but only li htly bent around the conductor.
  • strength may be used or the holding member may be so dimensioned that it possesses great of great mechanical strength to enable it to withstand a very high wrapping speed.
  • FIG. 1 shows one way of practicing my in vention
  • Fig. 1 of the drawings 1 is a copper conductor
  • 2 and 3 represents magnetic ribbon iron wrapped around the conductor 1 at a great pitch.
  • the direction of twist of the two ribbons is in the example I illustrated opposite but it will be understood that the direction may be the same.
  • t is a.
  • Magneticmaterials of any suitable kind may be used for wrapping on the Copper conductor.
  • insulating layers of any suitable kind for insulating the con ductor as well known in the art.
  • the insulating layers may be so arran ed that they serve at the same time as holding member. Such a design is illustrated in Fig. 2.
  • 5 is a copper conductor
  • 6 and 7 are the two layers of magnetic ribbon
  • 8 is a round cord braiding which at the same time takes the place of the holding member.
  • 9 is the usual paper tape wrapping.
  • Such a cable may preferably be so constructed that the application of the magnetic layers and the holding member as well as the insulation takes place in a single continuous manufacturing operation.
  • Telephone cable with continuously loaded 1' conductors said conductors being helically 40 wrapped with overlapping magnetic tapes, the pitch of said tapes amounting to at least fifteen times the diameter of the conductor.

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  • Communication Cables (AREA)
US397224A 1928-10-05 1929-10-04 Telephone cable Expired - Lifetime US1846636A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE332819X 1928-10-05

Publications (1)

Publication Number Publication Date
US1846636A true US1846636A (en) 1932-02-23

Family

ID=6205796

Family Applications (1)

Application Number Title Priority Date Filing Date
US397224A Expired - Lifetime US1846636A (en) 1928-10-05 1929-10-04 Telephone cable

Country Status (5)

Country Link
US (1) US1846636A (xx)
BE (1) BE364125A (xx)
FR (1) FR682445A (xx)
GB (1) GB332819A (xx)
NL (1) NL28506C (xx)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB8601270D0 (en) * 1986-01-20 1986-02-26 Raychem Ltd High frequency attenuation cable

Also Published As

Publication number Publication date
NL28506C (xx)
GB332819A (en) 1930-07-31
BE364125A (xx)
FR682445A (fr) 1930-05-27

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